Forms and documentation

Uniform Data Set (UDS)

The Uniform Data Set version 4 is now available for use at the ADRCs. The UDS contains longitudinal data, collected since 2005 during standardized annual evaluations conducted at the NIA-funded Alzheimer’s Disease Research Centers (ADRCs) across the country. Participants in the study represent the entire Clinical Core enrollment of the ADRCs, with cognitive status ranging from demented to mild cognitive impairment to cognitively normal. A subset of UDS participants are also evaluated with one of the additional sets of diagnosis-specific data-collection forms, the FTLD Module or the LBD Module.
For clinicians planning to administer the UDS, training materials are available.

For additional information on the development of UDSv4, see the UDSv4 Updates Page.

This overview of NACC data outlines UDS study population, collection methodology, and up-to-date participant statistics.

To use NACC forms in research outside of the ADRC program, please submit a Permission Request.

UDSv4 forms are currently only available in English. Please check back for Spanish and Chinese versions coming soon!

Essential documents

The Researchers Data Dictionary for the UDS is intended as the first and primary resource for those analyzing NACC clinical and demographic data. Updates to the RDD for UDSv4 are coming soon. See also this overview of the data available at NACC.

Initial Visit (IVP)Follow-up Visit (FVP)
Forms Packet, English

The full packet, containing all data collection forms in English. Alternatively, individual forms can be downloaded below.

 In Development
Forms Packet, Spanish

The full packet, containing all data collection forms in Spanish.

In DevelopmentIn Development
Forms Packet, Mandarin

The full packet, containing all data collection forms in Mandarin.

In DevelopmentIn Development
Forms Packet, Cantonese

The full packet, containing all data collection forms in Cantonese.

In DevelopmentIn Development
Coding Guidebook

The guidebooks provide detailed, annotated explanations of each form on an item-level basis, with instructions, operational definitions, and references.

 
Data Element Dictionary

In a compact format, the DEDs list all the variables and provide a detailed description, including data type, allowable codes, and information on skip patterns.

 

Individual forms

Initial Visit
(IVP)
Follow-up Visit
(FVP)
A1: Participant Demographics 

In development

A1a: Social Determinants of Health Optional Form 

In development

A2: Co-participant Demographics 

In development

A3: Participant Family History 

In development

A4: Participant Medications 

In development

A4a: ADRD-Specific Treatments 

In development

A5/D2: Participant Health History/Clinician-assessed Medical Conditions 

In development

B1: Evaluation Form - Vital Signs and Anthropometrics 

In development

B3: Unified Parkinson's Disease Rating Scale (UPDRS) - Motor Exam 

In development

B4: CDR® Dementia Staging Instrument Plus NACC FTLD Behavior & Language Domains (CDR® Plus NACC FTLD) 

In development

B5: Behavioral Assessment - Neuropsychiatric Inventory Questionnaire (NPI-Q) 

In development

B6: Behavioral Assessment - Geriatric Depression Scale (GDS) 

In development

B7: Functional Assessment - NACC Functional Assessment Scale (FAS) 

In development

B8: Evaluation Form - Neurological Examination Findings 

In development

B9: Clinician Judgment of Symptoms 

In development

C2: Neuropsychological Battery Scores 

In development

C2T: Neuropsychological Battery Scores for T-cog 

In development

D1a: Clinical Syndrome 

In development

D1b: Etiological Diagnosis and Biomarker Support 

In development